C7H9NO3S
187.22 g/mol
Dye & PigmentDanger
2-Amino-5-methylbenzenesulfonic acid
CAS88-44-8EC201-831-3
Category
Dye & Pigment
Compound Class
Amine
Primary Use
Pigment intermediate
2-Amino-5-methylbenzenesulfonic acid is an organic compound used as a pigment intermediate. Its structure features an aromatic ring with both an amino group and a sulfonic acid group, contributing to its utility in dye and pigment manufacturing.
Pigment intermediate
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
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Pigment intermediate
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3-amino-4-methoxybenzanilide
CAS120-35-4
Pigment intermediate
ReferenceSame Category
2,5-diaminobenzenesulfonic acid
CAS88-45-9
Intermediate for azo dyes
ReferenceSame Category
4-Amino-2,5-dichlorobenzenesulfonic acid
CAS88-50-6
Dye intermediate
ReferenceSame Category
3-amino-6-chlorotoluene-4-sulfonic acid
CAS88-53-9
Intermediate for paint and pigment
ReferenceSame Category
2,4-diaminobenzenesulfonic acid
CAS88-63-1
Dye intermediate for azo dyes
Safety Reference
Danger
H314Causes severe skin burns and eye damage
Customs Tariff Classification
The international HS code for 2-Amino-5-methylbenzenesulfonic acid (CAS 88-44-8) is 2921.43.
HS code (international, 6-digit)
2921.43
EU CN code (8-digit)
2921 43 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
2-amino-5-methylbenzenesulfonic acid
InChIKey
LTPSRQRIPCVMKQ-UHFFFAOYSA-N
SMILES
CC1=CC(=C(C=C1)N)S(=O)(=O)O
Synonyms (26)
- PTMS
- PTMSA
- 4-METHYL-2-SULFOANILINE
- 6-Amino-m-toluensulfonic acid
- P-TOLUIDINE-M-SULFONIC ACID
- Ptmsptmsa
- Red 4B acid
- p-Toluidine-2-sulfonic Acid
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